====== Plastic criteria ======

The ''PlasticCriterion'' class manages the possibility to replace the default [[doc:user:elements:volumes:plasticity_criterion|Von Mises plastic criterion]] by another one, described below. 

===== Comp1DirPlasticCriterion =====

=== Description ===

Plastic criterion for orthotropic composite plies with unidirectional fibers. Also used with woven fibers.

$$
\overline{\sigma}
= \sqrt{\sigma_{12}^2+\sigma_{13}^2+\sigma_{23}^2
+a^2\, \sigma_{22}^2
+b^2\, \sigma_{33}^2}
$$

=== Parameters ===

^  Name  ^  Metafor Code ^
| COMP1DIR_A   |  ''COMP1DIR_A''  |
| COMP1DIR_B   |  ''COMP1DIR_B''  |